What is the appropriate image resolution or size do I need for the web or for print? This question comes up every so often and I found this article from iStockphoto quite helpful and thought I’d post it here: I Resolve to be more Resolute: Understanding Resolution.

But before you do, here are also a few items to remember:

1) Terms

dpi – Dots Per Inch

ppi - Pixels Per Inch

ppc - Pixels Per Centimeter (European)

2)

Pixels – refer to the quality of the image

DPI – size measurement, affects physical output of file (print)

3) Dividing the number of pixels by the resolution will give you the maximum size you can print a quality image: So for example: 3000px/ 300 dpi = 10 inches. This means, you can print a good quality image of up to 10 inches max …(i.e. good photo quality from wallets, 4×6, 5×7 and 8×10).

At the same time, having a 72 dpi image does not mean that you cannot get a decent image print…

Now, of course, I hope that you will ONLY print your personal photos or photos that your photographers released to you for reproduction. Owen Photographie, family and children photographer And that is another topic for later….